---
title: "CVE-2015-5309\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2015-5309?format=md
keywords: index, follow
---

# CVE-2015-5309

Publication date 7 December 2015

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

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## Description

Integer overflow in the terminal emulator in PuTTY before 0.66 allows
remote attackers to cause a denial of service (memory corruption) or
possibly execute arbitrary code via an ECH (erase characters) escape
sequence with a large parameter value, which triggers a buffer underflow.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2015-5309?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| putty | 19.04 disco | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Not affected |
| 17.04 zesty | Not affected |
| 16.10 yakkety | Not affected |
| 16.04 LTS xenial | Not affected |
| 15.10 wily | Ignored end of life |
| 15.04 vivid | Fixed 0.63-10+deb8u1build0.15.04.1 |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Ignored end of life |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2015-5309?format=md#patch-details)

## Notes

---

### [sbeattie](https://launchpad.net/~sbeattie)

vuln between 0.54 and 0.65 inclusive

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| putty | * Upstream:   <http://tartarus.org/~simon-git/gitweb/?p=putty.git;a=commitdiff;h=6056396f77cafc7e40da4d09f1d6212408dcb065> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5309)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-5309)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-5309)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-5309)

### Other references

* <http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-ech-overflow.html>
* <https://www.cve.org/CVERecord?id=CVE-2015-5309>